//package com.sky.service.impl;
//
//import com.alibaba.fastjson.JSON;
//import com.alibaba.fastjson.JSONObject;
//import com.sky.constant.MessageConstant;
//import com.sky.dto.UserLoginDTO;
//import com.sky.entity.User;
//import com.sky.exception.LoginFailedException;
//import com.sky.mapper.UserMapper;
//import com.sky.properties.WeChatProperties;
//import com.sky.service.UserService;
//import com.sky.utils.HttpClientUtil;
//import lombok.extern.slf4j.Slf4j;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.stereotype.Service;
//
//import java.time.LocalDateTime;
//import java.util.HashMap;
//import java.util.Map;
//
//@Service
//@Slf4j
//public class UserServicceImpl implements UserService {
//
//    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
//
//    @Autowired
//    private WeChatProperties weChatProperties;
//
//    @Autowired
//    private UserMapper userMapper;
//
//    @Override
//    public User wxLogin(UserLoginDTO userLoginDTO) {
//        //获取用户的openid
//        String openid = getOpenid(userLoginDTO.getCode());
////判断openid是否存在，如果不存在，则抛出异常
//        if(openid==null){
//            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
//        }
//
//        //判断用户是否是否为新用户
//        User user = userMapper.getByOpenid(openid);
//        //如果是新用户，则自动注册
//        if(user==null) {
//            user = User.builder()
//                    .openid(openid)
//                    .createTime(LocalDateTime.now())
//                    .build();
//            userMapper.insert(user);
//        }
//        //返回用户信息
//            return user;
//    }
//    private String getOpenid(String code) {
//        //获取用户的openid/
//        Map<String, String> map=new HashMap<>();
//        map.put("appid", weChatProperties.getAppid());
//        map.put("secret", weChatProperties.getSecret());
//        map.put("js_code", code);
//        map.put("grant_type", "authorization_code");
//        String json = HttpClientUtil.doGet(WX_LOGIN, map);
//        JSONObject jsonObject = JSON.parseObject(json);
//        String openid = jsonObject.getString("openid");
//        return openid;
//    }
//}

package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j

public class UserServicceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());

        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        //如果是新用户，自动完成注册
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        //返回这个用户对象
        return user;
    }

    /**
     * 调用微信接口服务，获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}

